JPS61273295A - Welding method with non-consumable electrode - Google Patents

Abstract

PURPOSE:To improve welding efficiency and to permit the sure welding of a narrow groove by slitting an electrode from the top end to form at least >=2 pointed ends and generating arcs from the plural points. CONSTITUTION:The slit 6 inclusive of the axial line of the electrode 1 is inscribed to the electrode to the required depth from the top end and the top ends of the parts divided by the slit 6 are cut out point-symmetrically. The arcs are generated from the pointed ends 7a, 7b of the electrode if the arcs are generated with such electrode 1. The deflection of the arc to the boundary part at the groove and the substantial penetration arc thus made possible without oscillation. The slit may be made cruciform and the combination use of mechanical or magnetic oscillation therewith is also possible. The welding effeciency is thus improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a non-consumable electrode welding method that attempts to improve the bead shape and penetration shape by improving the electrode shape.

[Conventional technology]

The shape of the conventional non-consumable electrode is a five-cone shape as shown in FIGS. The result is as shown in FIG. That is, an arc (2) emitted from the tip of the electrode (1) generates a circular pool (3) directly below the mipole (1). In order to generate a bead over the entire width of the groove using such an electrode, it is necessary to oscillate, but sufficient penetration of the boundary between the bottom surface (4) and the side surface (5) of the groove can be obtained. Welding itself is difficult in narrow grooves where it is difficult to oscillate and where there are often no grooves.

[Problem that the invention seeks to solve]

In view of the above circumstances, the present invention is designed to form a wide pool under the electrode so that sufficient penetration can be obtained even in the above-mentioned boundary area, thereby achieving high performance and high quality even in narrow gap welding where oscillation is difficult. [Means for solving the problem] The present invention aims to provide a welding method that can perform welding.
The above-mentioned tips are formed so that arcs are generated from a plurality of points, each in a specific direction.

[For production]

Since arcs are generated from multiple points, a large, wide pool is formed, and a wide bead can be obtained without on-rate.

〔Example〕

The present invention will be described in detail below with reference to the drawings.

FIGS. 1(A), 2(B), and 2(C) show a first embodiment of the present invention.

A slit (6) including the mipolar axis is carved at the required depth from the tip of the electrode (1), and the tips of each portion divided by the slit (6) are cut out in a cut-out shape and point symmetrical. .

When an arc is generated by such an electrode (1), an arc (2α) (2b) is generated from each tip of the electrode (7G) (7b).
This generates a large flat pool (3), and even without oscillation, the arc can be deflected to the groove boundary and not penetrate sufficiently (Figure 2).

Furthermore, by rotating the electrode (1), even if the welding torch is fixed, the same effect as oscillation can be achieved, and even deeper penetration can be achieved (Fig. 3). When used for open welding, a wide bead can be obtained, reducing the number of passes and improving welding efficiency, and when used for narrow gap welding, it is possible to perform narrow gap welding stably and reliably, which was previously difficult. I can do it.

Fig. 4 (a) (b) ρ→, Fig. 5 shows another embodiment,
It is divided by slits (6) and V-shaped notches (8) are made to form four points.

FIG. 6 shows how the pool (3) is formed when the electrode (1) shown in FIG. 4 is rotated.

Moreover, FIGS. 7(a), 7(b), and 8 show other embodiments, in which a V-shaped notch (
8) and cut the other end into a 7-shape to form three points. FIG. 9 shows how the pool (3) is formed when the electrode (1) shown in FIG. 7 is rotated.

In the above embodiment, the slits are arranged in the shape of a single character, but it goes without saying that the slits may be arranged in the shape of a cross, and it is also possible to use mechanical oscillation, magnetic oscillation, etc. in combination with this method.

〔Effect of the invention〕

As described above, according to the present invention, welding efficiency can be improved and narrow gap welding can be reliably performed.

[Brief explanation of drawings]

FIG. 1 shows the electrode shape for the first embodiment of the invention,
(A) is a front view, (B) is a side view, (C) is a bottom view, Figure 2 is a diagram showing the state of arc generation, and Figure 3 is an explanatory diagram of the state of pool formation when the electrode is rotated. , Figure 4 (a) (
B) (C) are diagrams showing the electrode shape for the second embodiment, Figure 5 is a diagram showing the arc generation state, and Figure 6 is an explanation of the pool generation state when the electrode is rotated. Figures 7 (a) and 7 (b) 0→ are diagrams showing the electrode shape for the third embodiment, Figure 8 is a diagram showing the state of arc generation, and Figure 9 is a diagram showing the electrode shape when the electrode is rotated. 10(a) and 10(b) are diagrams showing the conventional electrode shape, and FIG. 11 is a diagram showing the arc generation state of the conventional electrode. Electrode, (2) (2α) (2b) is arc, (3) is pool, (4) is bottom, (5) is side, (6) is slit, (7,) (7b) is tip, (8 ) indicates the depth of cut. Figure 1 Figure 4 (A) (B) (A) (B) (l\)
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~゛ O~' Figure 2 Figure 5 Figure 3 Figure 6 Figure 7 Figure 10 (A) (B) (A) (C) (B) @~゛ Ge Figure 8 Figure 11 Figure 9 figure

Claims (1)

[Claims] 1) A non-consumable electrode welding method characterized in that a slit is made from the tip of the electrode to form at least two points, and arcs are generated from multiple points.